Difference between revisions of "Cuscuta chinensis var. applanata"
Organisms Diversity Evol. 11: 383. 2011.
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|subgenus=Cuscuta subg. Grammica | |subgenus=Cuscuta subg. Grammica | ||
Latest revision as of 13:14, 24 November 2024
Stems yellow to creamy, slender to medium. Inflorescences glomerulate to loosely paniculiform; bracts at base of clusters 1, at base of pedicels 0 or 1, broadly ovate to subround, membranous, margins entire, apex obtuse to rounded. Pedicels 0.4–2 mm. Flowers 5-merous, 2.5–3.5 mm, membranous, not papillate; calyx straw yellow, shallowly cupulate, equaling corolla tube length, divided 1/2 its length, reticulate, shiny, lobes broadly triangular-ovate, bases overlapping, margins entire or irregular, midvein carinate with multicellular protuberances, apex rounded to obtuse; corolla white, drying creamy yellow, 2–2.4 mm, tube campanulate, becoming globose to depressed-globose or urceolate, 1–1.3 mm, not saccate, lobes spreading, ovate-lanceolate, equaling corolla tube length, margins entire, apex rounded, ± incurved, not inflexed; infrastaminal scales obovate, 1.2–1.8 mm, equaling or longer than corolla tube length, bridged at 0.2–0.4 mm, long-fimbriate in distal 1/2, fimbriae 0.2–0.4 mm; stamens exserted, shorter than corolla lobes; filaments 0.3–0.6 mm; anthers 0.4–0.6 × 0.4–0.5 mm; styles filiform, 0.9–1.7 mm, equaling or longer than ovary. Capsules depressed-globose, slightly angular, 1.8–2.5 × 0.8–1.6 mm, not thickened or raised around relatively small interstylar aperture, translucent, surrounded by withered corolla, dehiscence circumscissile. Seeds (1–)3 or 4, angled, broadly ellipsoid, 0.8–1.2 × 0.8–1.1 mm, hilum region almost terminal.
Phenology: Flowering Jul–Oct.
Habitat: Hosts: Amaranthus, Ambrosia, Anisacanthus, Bahia, Baileya, Boerhavia, Chamaecrista, Chamaesaracha, Croton, Dalea, Flaveria, Ipomoea, Parthenium, Sanvitalia, Solanum, Tiquilia, Tragia, Viguiera, and others.
Elevation: 100–1500 m.
Distribution
Ariz., N.Mex., Tex., Utah, Mexico.
Discussion
Varieties applanata and chinensis are similar morphologically but geographically disjunct as a result of a long-distance dispersal event from North America to Australia/Asia (M. Costea et al. 2011b).
Selected References
None.